Complete Swamp Cooler - How to build a low-cost 12 volt evaporative cooler. My husband and I built two swamp coolers that we use to air condition our tent when we camp in hot, dry weather at Burning Man.
My husband made this homemade swamp cooler in about 20 minutes for only $31.00 in parts to cool the kids' room down using only the power of a six inch fan and a block of ice. Awesome! You Need: Ice chest 6" fan PVC elbow Silicone Block of ice